Outlook 2016 oab not updating in cached mode

They do for my colleague sitting next to me, so I don’t think it is a server misconfiguration or something like that.Is there any way I can force a manual update of the Offline Address Book (OAB) in Outlook or reset it completely otherwise?In Outlook 2010 and previous, it is recommended to leave the option “Full Details” enabled.In Outlook 2013 and Outlook 2016, you’ll find that this option is no longer available as full details are also used to build the Contact Card.

To improve this situation we need to look at the Outlook Anywhere configuration for the Client Access servers.At the moment each of the servers is configured with their own name as the internal host name for Outlook Anywhere, which is the default.Get-Client Access Server | Get-Outlook Anywhere | select identity,*hostname Identity : E15MB1Rpc (Default Web Site) External Hostname : Internal Hostname : e15mb1.exchange2013Identity : E15MB2Rpc (Default Web Site) External Hostname : Internal Hostname : e15mb2.exchange2013We can configure a single namespace for these instead of the unique server FQDN for each.If you're not already familiar with Outlook Anywhere from previous versions of Exchange it is the service that provides RPC/MAPI connectivity for Outlook clients over HTTP or HTTPS.While this was typically only used for remote/external access in the past, architectural changes in Exchange 2013 mean that all Outlook connectivity is via HTTP/HTTPS even for internal clients.